Home / 14,290.47-19,720.40-7,916.81

Finding the Fourth Proportional to 14,290.47, 19,720.40 and 7,916.81

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Solution

The fourth proportional to 14,290.47, 19,720.40 and 7,916.81 is: 10,924.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.47 : 19,720.40 = 7,916.81 : x
  2. Step 2: Convert to fraction form
    14,290.47/19,720.40 = 7,916.81/x
  3. Step 3: Cross multiply
    14,290.47x = 19,720.40 × 7,916.81
  4. Step 4: Simplify right side
    14,290.47x = 156,122,581.11
  5. Step 5: Solve for x
    x = 156,122,581.11/14,290.47
  6. Step 6: Final answer
    x = 10,924.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.